Miles Anderson, Analytical Laboratories of Hawaii
2004
Habitat Zone, Cover and Structure Maps of Alamagan, Northern Mariana Archipelago 2001-2003, Derived From IKONOS Imagery
version 1.1
PDF
Kailua, Hawaii
Analytical Laboratories of Hawaii
http://ccma.nos.noaa.gov/ecosystems/coralreef/us_pac_terr/
Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), National Centers for Coastal Ocean Science (NCCOS), Center for Coastal Monitoring and Assessment (CCMA), Biogeography Program
2004
Benthic Habitats of the Mariana Archipelago Prepared by Visual Interpretation from IKONOS satellite imagery procured by NOAA
version 1.1
map
Silver Spring, MD
NOAA's Ocean Service, National Centers for Coastal Ocean Science (NCCOS)
This project is a cooperative effort between the National Ocean Service, National Centers for Coastal Ocean Science, Center for Coastal Monitoring and Assessment, the University of Hawaii, BAE Systems Spectral Solutions and Analytical Laboratories of Hawaii, LLC. The goal of the work was to map the coral reef habitats of American Samoa, Guam and the Common Wealth of the Northern Mariana Islands by visual interpretation and manual delineation of IKONOS satellite imagery.
A two tiered habitat classification system was tested and implemented in this work. It integrates geomorphologic reef structure and biological cover into a single scheme and subsets each into detail. It also includes thirteen zones. Benthic features were mapped that covered an area of 45.2 square kilometers of which 4.4 were unconsolidated sediment and 40.9 were coral reef and hard bottom. Of the coral reef and hard bottom class, 59.9% is colonized by greater than 10% coral cover.
The National Ocean Service is conducting a map production effort to digitally map biotic resources and coordinate a long-term monitoring program that can detect and predict change in U.S. coral reefs, and their associated habitats and biological communities.
2001
2003
ground condition
Complete
None planned
145.84
145.84
17.60
17.60
CRCP ProjectMapping the shallow-water coral reef ecosystems of American Samoa, Guam, and the Northern Marianas1209
CoRIS Discovery Thesaurus
Map Images > Habitats
CoRIS Theme Thesaurus
EARTH SCIENCE > Biosphere > Vegetation > Algae > Coralline Algae
EARTH SCIENCE > Oceans > Coastal Processes > Coral Reefs > Coral Reef Ecology > Habitats
EARTH SCIENCE > Biosphere > Aquatic Habitat > Coastal Habitat
EARTH SCIENCE > Biosphere > Aquatic Habitat > Reef Habitat
EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > Mapping > Habitat Mapping
None
coral reef
coralline algae
habitat
reef
submerged aquatic vegetation
unconsolidated sediments
zone
structure
cover
ISO 19115 Topic Category
imageryBaseMapsEarthCover
010
CoRIS Place Thesaurus
OCEAN BASIN > Pacific Ocean > Western Pacific Ocean > Alamagan Island > Alamagan Island (17N145E0002)
COUNTRY/TERRITORY > Northern Mariana Islands > Alamagan Island > Alamagan Island (17N145E0002)
CoRIS Region
CNMI
None
United States
Mariana Islands
CNMI
None
Not for navigation
National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), National Centers for Coastal Ocean Science (NCCOS), Center for Coastal Monitoring and Assessment (CCMA), Biogeography Program
Biogeography Team Leader, Mapping Manager
mailing and physical address
1305 East West Highway
Silver Spring
MD
20910
301-713-3028
301-713-4388
steve.rohmann@noaa.gov
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 1; ESRI ArcCatalog 9.0.0.535
A statistically robust field data set was collected to assess the thematic accuracy of the map products. A random stratified sampling method was implemented to select field sites to conduct this test. Each site was navigated to using a Trimble Geo Explorer 3 GPS data logger, and positional data was acquired. A total of 1113 GPS waypoints were occupied and benthic characterizations conducted for the purpose of accuracy assessment.
Areas that were obscured by cloud cover or where other environmental conditions such as glint of turbidity prevented visual interpretation of the benthic habitats were assigned an attribute of "unknown". Field observations that fell in polygons designated "unknown" were not included in the statistical analysis. During this survey, 5 of the 1113 field observations were excluded for this reason and 1108 observations were used in the accuracy assessment.
A statistical analysis that generated a Tau statistic was preformed. The Tau statistic for the major classes exceeded 0.85 and for detailed classes exceeded 0.75. Overall thematic accuracy was established as 98.7% and 92.6% for the major structure and cover classes and 87.8% and 81% for the detailed classes respectively for the entire Mariana Archipelago.
All mapping was conducted from orthorectified IKONOS satellite imagery provided by NOS prior to map production. IKONOS satellite imagery was corrected for atmospheric and water column effects, color balanced, pan sharpened and deglinted. During the digitizing process, image stretches and manipulating image contrast, brightness and color balance were performed in the ArcView Image Analysis Extension to enhance features in the processed imagery.
GIS topologic quality was established by executing ArcView extension routines that check for: overlapping polygons, multipart polygons, sliver polygons and void polygons. Additionally checks for adjacent polygons with the same habitat attributes were completed. All errors were identified and corrected. This file is believed to be logically consistent.
NOAA supplied georeferenced imagery to Analytical Laboratories of Hawaii through BAE Systems Spectral Solutions. Delineation of all habitat boundaries was conducted with the image scale at 1:6,000. This ensures that the level of detail produced by the photo interpreter is uniform throughout the project. Also, NOAA has shown from similar mapping efforts in the Caribbean and Florida Keys that little additional information is gained from having the image at a smaller scale and the labor intensity increased significantly.
The minimum mapping unit (MMU) for identifying habitats or features was 1 acre. The software utilized in this project was designed to alert the photo interpreter each time a polygon was drawn smaller than the MMU. When this occurred the photo interpreter has the choice whether to include the polygon in the data set. Only in areas where local coral reef managers expressed interest in specific map classes or in Marine Protected Areas were polygons of smaller then the MMU allowed.
RMS from digitized output was determined using the ESRI RMEer2 extension and shown to be less than 1m when conducted at 1:6000 scale.
M.S. Coyne
2003
Classification Scheme for Benthic Habitats of the Pacific
document
Silver Spring, MD
NOAA's Ocean Service, National Centers for Coastal Ocean Science (NCCOS)
http://biogeo.nos.noaa.gov/projects/mapping/pacific/territories/classification/
Report
2003
publication date
Classification Scheme for Benthic Habitats of the Pacific
This document identified the zone, structure and biological cover types attributed in the data set
Ken Buja
2003
Coral Reef Digitizing Extension
Silver Spring, MD
NOAA's Ocean Service (NOS), National Centers for Coastal Ocean Science (NCCOS)
http://ccma.nos.noaa.gov/products/biogeography/digitizer/welcome.html
computer program
2003
publication date
Habitat Digitizer
This ArcView extension was used to digitize and attribute benthic zones, structure and biological cover of this map.
Space Imaging Inc.
2003
IKONOS Satellite Imagery
remote-sensing image
Thornton, CO
Space Imaging Inc.
This imagery was obtained at a 4 m pixel resolution, corrected for water column and atmospheric effects, deglinted and Pan sharpened.
CD-ROM
2001
2003
ground condition
IKONOS imagery
Used to identify and digitize benthic habitats for the Mariana Archipelago.
IKONOS images used in this habitat product were observed in 2001 through 2003. Benthic habitat maps were digitized by delineating habitat boundaries from georeferenced orthorectified IKONOS satellite imagery loaded into ArcView 3.3 GIS software with the Image Analysis and NOAA Coral Reef Habitat Digitizing extensions both activated. Digitizing was conducted using heads-up on computer screen methods with the minimum mapping unit (MMU) set to 1 acre and the image scale at 1:6,000.
All IKONOS imagery was processed by NOS prior to map production. The imagery was corrected for atmospheric and water column effects, pan sharpened and deglinted. During the digitizing process, images were stretched and contrast, brightness and color balance were modified using the Arc View Image Analysis Extension to enhance features in the processed imagery.
A first draft map was completed and features in the imagery where uncertainties existed, due to confusing or difficult to interpret signatures, were identified for future ground validation effort. An ArcView GIS point theme was generated with points positioned on the features of uncertain habitat type or along transects though gradients between habitat types. The GIS points were converted to GPS waypoints using Trimble Pathfinder Software and were navigated to in the field using a Trimble GeoExplorer 3 GPS data logger.
A benthic habitat characterization was conducted at each site by snorkeling, free diving, or where water depth and clarity permitted, by observation from the surface . GPS data were collected at each location and site ID, depth, habitat type, zone and the method used to make the assessment were recorded. A second draft of the map was generated incorporating these ground validation data.
2004
Dr. Miles Anderson
Analytical Laboratories of Hawaii, LLC
Researcher
mailing and physical
1320 Aalapapa Dr.
Kailua
HI
96734
USA
(808) 262-2417
(808) 262-7027
miles@interpac.net
Metadata imported.
C:\DOCUME~1\Owner\LOCALS~1\Temp\xml7B.tmp
2004
Vector
G-Polygon
477
Universal Transverse Mercator
55
0.999600
147.000000
0.000000
500000.000000
0.000000
Coordinate Pair
0.002048
0.002048
meters
North American Datum of 1983
Geodetic Reference System 80
6378137.000000
298.257222
ncnmi_benthic_habitats_final
Shapefile attribute table
None
FID
Internal feature number.
ESRI
ESRI
Shape
Feature geometry.
ESRI
Coordinates defining the features.
ID
Value copied from UNIQUID field and used to run adjacency script for QA/QC
NOAA mapping QA/QC standard
Habitat description
Habitat classification scheme for the Pacific
UNIQUEID
4 digit numerical value representing a unique habitat combination of structure and cover attributes
Habitat digitizing extension
Habitat description
Habitat classification scheme for the Pacific
POLYGONID
Incremental value generated for QA/QC adjacency test
ArcView script
Incremental numeric field
AREA
Area of polygon
ArcView script
10.31
162605543.23
NA
PERIMETER
Perimeter of polygon
ArcView script
13.84
165991.33
NA
ACRES
Area of polygon in acres
ArcView script
0.003
40179.83
NA
ISLAND
Name of Island
Manually assigned string
Manually assigned character field
M_STRUCT
Major reef structure
Habitat digitizing extension
Assigned during digitizing character field
D_STRUCT
Detailed structure
Habitat digitizing extension
Assigned during digitizing character field
M_COVER
Major biological cover
Habitat classification scheme
Assigned during digitizing
P_COVER
Percent biological cover of major cover type
Habitat classification scheme
Assigned during digitizing character field
ZONE
Geomorphologic zone
Habitat classification scheme
Assigned during digitizing character field
COVER_TYPE
Concatenated field of major cover and percent cover used for legend fill
ArcView script
Character field
National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), National Centers for Coastal Ocean Science (NCCOS), Center for Coastal Monitoring and Assessment (CCMA), Biogeography Program
Biogeography Team Leader, Mapping Manager
mailing and physical address
1305 East West Highway
Silver Spring
MD
20910
301-713-3028
301-713-4388
steve.rohmann@noaa.gov
Downloadable Data
The National Oceanic and Atmospheric Administration (NOAA) National Centers for Coastal Ocean Science (NCCOS) produced this data CD-ROM. NCCOS Biogeography Program does not guarantee the accuracy of the geographic features or attributes. Please see the metadata records for each data set for complete information on the source, limitations, and proper use.
NOAA makes no warranty regarding these data, expressed or implied, nor does the fact of distribution constitute such a warranty. NOAA can not assume liability for and damages caused by any errors or omissions in these data, nor as a result of the failure of these data to function on a particular system.
PDF
http://ccma.nos.noaa.gov/ecosystems/coralreef/us_pac_terr/html/maps/
None
Contact NOAA for distribution options (see Distributor). All maps of the Northern Mariana Archipelago prepared during this tenure are incorporated into this metadata summary.
20140908
National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), National Centers for Coastal Ocean Science (NCCOS), Center for Coastal Monitoring and Assessment (CCMA), Biogeography Program
Biogeography Team Leader, Mapping Manager
mailing and physical address
1305 East West Highway
Silver Spring
MD
20910
301-713-3028
301-713-4388
steve.rohmann@noaa.gov
FGDC Content Standard for Digital Geospatial Metadata
FGDC-STD-001-1998
Local Time
20050323093926
None
20010101
20031231
http://www.coris.noaa.gov/metadata/records/html/habitat_types_alamagan_2003.html
900